定语从句优质课课件下面是小编整理的定语从句优质课课件，欢迎阅读。Ⅰ.定义定语从句，起形容词的作用，在句中常用来修饰名词或代词。被修饰的词称为先行词,引导定语从句的词称为关系词,关系词的作用一是放在先行词与定语从句中间起引导作用;二是在意义上代替先行词,并在从句中充当一个成分。其中关系代词：who,whom,whose,which,that,as;关系副词：when,where,why。eg.Sheisthegirlwhosingsbestofall.Thepenwhichmyunclegavemeismissing.Helivesinahousewhosewindowsfacesouth.Thefactorywheremyfatherworksisintheeastofthecity.Perhapsthedaywillcomewhenpeoplewillbeabletobreathecleanairincities.Ⅱ.关系代词1.先行词是人，作主语，关系代词用who,thateg.Heisaman()neverleavestoday’sworktilltomorrow.Theboy()isstandingthereismycousin.2.先行词是人，作宾语，关系代词用whom,who,that,eg.Hereistheman()you’vebeenexpectingtomeet.Theman()youmetyesterdayisMr.Smith.3.先行词是物，作主语，关系代词用which,thateg.Thetrain()hasjustleftisforGuangzhou.Childrenliketoreadbooks()havewonderfulpictures.4.先行词是物，作宾语，关系代词用which,that,或省略eg.Thebook()youborrowedyesterdayisreallyinteresting.Thepen()myunclegavemeismissing.5.先行词是人、物，作定语，关系代词用whoseeg.Heistheprofessor()namewasJackson.China,()populationisthelargestintheworld,isdevelopingveryfast.Ⅲ.关系副词1.先行词是表示时间的名词，在定从中作时间状语，关系代词用wheneg.Ican’trememberthedate()hewentabroad.I’llneverforgettheday()Ijoinedthearmy.2.先行词是表示地点的名词，在定从中作地点状语，关系代词用where;其中注意表示抽象概念的地点名词，如，situation、stage、degree、point等表示方面或程度时，也需用whereeg.Thisisthevillage()UncleWangoncelived.Theyhavereachedthepoint()theyhavetoseparatewitheachother.He’sgothimselfintoadangeroussituation()heislikelytolosecontrolovertheplane.3.先行词是reason，在定从中作原因状语，关系代词用whyeg.Idon’tknowthereason()hewaslate.Noneofusknowthereason()Tomwasabsentfromthemeeting.4.引导定语从句的关系副词也可以用“适当介词+which”来代替。eg.October1,1949wasthedaywhen(=)thePeople’sRepublicofChinawasfounded.Thisisthefactorywhere(=)weworkedayearago.Idon’tbelievethereasonwhy(=)hewaslateforschool.Ⅳ.关系代词that&which的区别:⒈只用that的`情况①先行词为all,everything,anything,nothing,little,much等不定代词时。eg.Thereisnothing()canpreventhimfromdoingit.②先行词被any,only,few,no,very,little等修饰时。eg.Thisistheverybook()I’mlookingfor.③先行词被形容词最高级或序数词修饰时。eg.Thefirstplace()theyvisitedinGuilinwasElephantTrunkHill.Thisisthebestfilm()Ihaveeverseen.④先行词既有人又有